Real Algebraic and Analytic Geometry

Preprint Server

Previous   Next
90. Digen Zhang:
An elementary proof that the length of X14+X24+X34+X44 is 4.


Submission: 2004, February 13.

An elementary proof is given, to show that the quartic form X14+X24+X34+X44 cannot be written as a sum of three squares of real quadratic forms.

Full text, 4p.: dvi 18k, ps.gz 77k, pdf 96k.

Server Home Page